kchamber

Responses from kchamber

Don’t buy used McCormack DNA 1990s amps
@jetter  The one amp brought to me was fully functional. It had been back to CJ about 20 years ago for the input board replacement. That was just prior to the current owner purchasing it. It's worked perfectly for him during his time with it. He ... 
Don’t buy used McCormack DNA 1990s amps
@jetter  Sorry I should've been more clear on that. What I meant is that CJ is still repairing and restoring amps that are sent to them. I only contacted CJ for schematics and they offered a full rebuild in response. For my own DNA1 amp and anoth... 
Don’t buy used McCormack DNA 1990s amps
@davidbeagrace  CJ is still working on the DNA amps. When I contacted them a couple months back for schematics they offered to upgrade and rebuild the DNA1 I was working on. Here's an excerpt from that email. "The only repair/update we offer is ... 
Don’t buy used McCormack DNA 1990s amps
@mitch2 I suspect this is heading way deep into proprietary business issues. Since C-J acquired McCormack, it would seem that any notifications about the equipment would be the responsibility of C-J and likewise any sharing of equipment schemat... 
Don’t buy used McCormack DNA 1990s amps
@mitch2 I believe you guys are making assumptions based on facts not in evidence, and unfairly casting SMc Audio in a negative light.  If you know Steve and Patrick, you would also know that there are not many folks in the audio industry who ca... 
Don’t buy used McCormack DNA 1990s amps
@soix If you had any technical knowledge on electronics then you’d know that you do NOT have to build the exact same piece of electronics to understand the location and nature behind a failure. Especially when that failure is a mechanical issue ... 
Don’t buy used McCormack DNA 1990s amps
@fsonicsmith1  I'm located near Dallas. I mainly do work for local audiophiles because I work as a research engineer M - F so this audio work is done in my spare time. I do some work on Acurus and Aragon preamps for folks around the country. I ha... 
Don’t buy used McCormack DNA 1990s amps
@soix  You're correct I pulled that number out of my butt, using nothing but my 35yrs of experience designing and working on electronics in semiconductor manufacturing and research. Guess what? Krell & Levinson amps of the same vintage are a... 
Don’t buy used McCormack DNA 1990s amps
@soix in response to your initial post. You're being extreme. All DNA amplifiers are not doomed to failure. Do original amps have a much higher failure rate than normal, probably so. However, I'd be willing to bet that 50% or more of them will sti...